/* pngconf.h - machine configurable file for libpng
 *
 * libpng version 1.4.2 - May 6, 2010
 * For conditions of distribution and use, see copyright notice in png.h
 * Copyright (c) 1998-2010 Glenn Randers-Pehrson
 * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
 * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
 *
 * This code is released under the libpng license.
 * For conditions of distribution and use, see the disclaimer
 * and license in png.h
 *
 */

/* Any machine specific code is near the front of this file, so if you
 * are configuring libpng for a machine, you may want to read the section
 * starting here down to where it starts to typedef png_color, png_text,
 * and png_info.
 */

#ifndef PNGCONF_H
#define PNGCONF_H

#ifndef PNG_NO_LIMITS_H
    #include <limits.h>
#endif

/* Added at libpng-1.2.9 */

/* config.h is created by and PNG_CONFIGURE_LIBPNG is set by the "configure"
 * script.
 */
#ifdef PNG_CONFIGURE_LIBPNG
    #ifdef HAVE_CONFIG_H
        #include "config.h"
    #endif
#endif

/*
 * Added at libpng-1.2.8
 *
 * PNG_USER_CONFIG has to be defined on the compiler command line. This
 * includes the resource compiler for Windows DLL configurations.
 */
#ifdef PNG_USER_CONFIG
    #ifndef PNG_USER_PRIVATEBUILD
        #define PNG_USER_PRIVATEBUILD
    #endif
    #include "pngusr.h"
#endif

/*
 * If you create a private DLL you need to define in "pngusr.h" the followings:
 * #define PNG_USER_PRIVATEBUILD <Describes by whom and why this version of
 *        the DLL was built>
 *  e.g. #define PNG_USER_PRIVATEBUILD "Build by MyCompany for xyz reasons."
 * #define PNG_USER_DLLFNAME_POSTFIX <two-letter postfix that serve to
 *        distinguish your DLL from those of the official release. These
 *        correspond to the trailing letters that come after the version
 *        number and must match your private DLL name>
 *  e.g. // private DLL "libpng13gx.dll"
 *       #define PNG_USER_DLLFNAME_POSTFIX "gx"
 *
 * The following macros are also at your disposal if you want to complete the
 * DLL VERSIONINFO structure.
 * - PNG_USER_VERSIONINFO_COMMENTS
 * - PNG_USER_VERSIONINFO_COMPANYNAME
 * - PNG_USER_VERSIONINFO_LEGALTRADEMARKS
 */

#ifdef __STDC__
    #ifdef SPECIALBUILD
        #pragma message("PNG_LIBPNG_SPECIALBUILD (and deprecated SPECIALBUILD) \
    are now LIBPNG reserved macros. Use PNG_USER_PRIVATEBUILD instead.")
    #endif

    #ifdef PRIVATEBUILD
        #pragma message("PRIVATEBUILD is deprecated. \
    Use PNG_USER_PRIVATEBUILD instead.")
        #define PNG_USER_PRIVATEBUILD PRIVATEBUILD
    #endif
#endif /* __STDC__ */

/* End of material added to libpng-1.2.8 */

#ifndef PNG_VERSION_INFO_ONLY

/* This is the size of the compression buffer, and thus the size of
 * an IDAT chunk.  Make this whatever size you feel is best for your
 * machine.  One of these will be allocated per png_struct.  When this
 * is full, it writes the data to the disk, and does some other
 * calculations.  Making this an extremely small size will slow
 * the library down, but you may want to experiment to determine
 * where it becomes significant, if you are concerned with memory
 * usage.  Note that zlib allocates at least 32Kb also.  For readers,
 * this describes the size of the buffer available to read the data in.
 * Unless this gets smaller than the size of a row (compressed),
 * it should not make much difference how big this is.
 */

    #ifndef PNG_ZBUF_SIZE
        #define PNG_ZBUF_SIZE 8192
    #endif

/* Enable if you want a write-only libpng */

    #ifndef PNG_NO_READ_SUPPORTED
        #define PNG_READ_SUPPORTED
    #endif

/* Enable if you want a read-only libpng */

    #ifndef PNG_NO_WRITE_SUPPORTED
        #define PNG_WRITE_SUPPORTED
    #endif

/* Enabled in 1.4.0. */
    #ifdef PNG_ALLOW_BENIGN_ERRORS
        #define png_benign_error png_warning
        #define png_chunk_benign_error png_chunk_warning
    #else
        #ifndef PNG_BENIGN_ERRORS_SUPPORTED
            #define png_benign_error png_error
            #define png_chunk_benign_error png_chunk_error
        #endif
    #endif

/* Added at libpng version 1.4.0 */
    #if !defined (PNG_NO_WARNINGS) && !defined (PNG_WARNINGS_SUPPORTED)
        #define PNG_WARNINGS_SUPPORTED
    #endif

/* Added at libpng version 1.4.0 */
    #if !defined (PNG_NO_ERROR_TEXT) && !defined (PNG_ERROR_TEXT_SUPPORTED)
        #define PNG_ERROR_TEXT_SUPPORTED
    #endif

/* Added at libpng version 1.4.0 */
    #if !defined (PNG_NO_CHECK_cHRM) && !defined (PNG_CHECK_cHRM_SUPPORTED)
        #define PNG_CHECK_cHRM_SUPPORTED
    #endif

/* Added at libpng version 1.4.0 */
    #if !defined (PNG_NO_ALIGNED_MEMORY) && !defined (PNG_ALIGNED_MEMORY_SUPPORTED)
        #define PNG_ALIGNED_MEMORY_SUPPORTED
    #endif

/* Enabled by default in 1.2.0.  You can disable this if you don't need to
   support PNGs that are embedded in MNG datastreams */
    #ifndef PNG_NO_MNG_FEATURES
        #ifndef PNG_MNG_FEATURES_SUPPORTED
            #define PNG_MNG_FEATURES_SUPPORTED
        #endif
    #endif

/* Added at libpng version 1.4.0 */
    #ifndef PNG_NO_FLOATING_POINT_SUPPORTED
        #ifndef PNG_FLOATING_POINT_SUPPORTED
            #define PNG_FLOATING_POINT_SUPPORTED
        #endif
    #endif

/* Added at libpng-1.4.0beta49 for testing (this test is no longer used
   in libpng and png_calloc() is always present)
 */
    #define PNG_CALLOC_SUPPORTED

/* If you are running on a machine where you cannot allocate more
 * than 64K of memory at once, uncomment this.  While libpng will not
 * normally need that much memory in a chunk (unless you load up a very
 * large file), zlib needs to know how big of a chunk it can use, and
 * libpng thus makes sure to check any memory allocation to verify it
 * will fit into memory.
 #define PNG_MAX_MALLOC_64K
 */
    #if defined (MAXSEG_64K) && !defined (PNG_MAX_MALLOC_64K)
        #define PNG_MAX_MALLOC_64K
    #endif

/* Special munging to support doing things the 'cygwin' way:
 * 'Normal' png-on-win32 defines/defaults:
 *   PNG_BUILD_DLL -- building dll
 *   PNG_USE_DLL   -- building an application, linking to dll
 *   (no define)   -- building static library, or building an
 *                    application and linking to the static lib
 * 'Cygwin' defines/defaults:
 *   PNG_BUILD_DLL -- (ignored) building the dll
 *   (no define)   -- (ignored) building an application, linking to the dll
 *   PNG_STATIC    -- (ignored) building the static lib, or building an
 *                    application that links to the static lib.
 *   ALL_STATIC    -- (ignored) building various static libs, or building an
 *                    application that links to the static libs.
 * Thus,
 * a cygwin user should define either PNG_BUILD_DLL or PNG_STATIC, and
 * this bit of #ifdefs will define the 'correct' config variables based on
 * that. If a cygwin user *wants* to define 'PNG_USE_DLL' that's okay, but
 * unnecessary.
 *
 * Also, the precedence order is:
 *   ALL_STATIC (since we can't #undef something outside our namespace)
 *   PNG_BUILD_DLL
 *   PNG_STATIC
 *   (nothing) == PNG_USE_DLL
 *
 * CYGWIN (2002-01-20): The preceding is now obsolete. With the advent
 *   of auto-import in binutils, we no longer need to worry about
 *   __declspec(dllexport) / __declspec(dllimport) and friends.  Therefore,
 *   we don't need to worry about PNG_STATIC or ALL_STATIC when it comes
 *   to __declspec() stuff.  However, we DO need to worry about
 *   PNG_BUILD_DLL and PNG_STATIC because those change some defaults
 *   such as CONSOLE_IO.
 */
    #ifdef __CYGWIN__
        #ifdef ALL_STATIC
            #ifdef PNG_BUILD_DLL
                #undef PNG_BUILD_DLL
            #endif
            #ifdef PNG_USE_DLL
                #undef PNG_USE_DLL
            #endif
            #ifdef PNG_DLL
                #undef PNG_DLL
            #endif
            #ifndef PNG_STATIC
                #define PNG_STATIC
            #endif
        #else
            #ifdef PNG_BUILD_DLL
                #ifdef PNG_STATIC
                    #undef PNG_STATIC
                #endif
                #ifdef PNG_USE_DLL
                    #undef PNG_USE_DLL
                #endif
                #ifndef PNG_DLL
                    #define PNG_DLL
                #endif
            #else
                #ifdef PNG_STATIC
                    #ifdef PNG_USE_DLL
                        #undef PNG_USE_DLL
                    #endif
                    #ifdef PNG_DLL
                        #undef PNG_DLL
                    #endif
                #else
                    #ifndef PNG_USE_DLL
                        #define PNG_USE_DLL
                    #endif
                    #ifndef PNG_DLL
                        #define PNG_DLL
                    #endif
                #endif
            #endif
        #endif
    #endif

/* This protects us against compilers that run on a windowing system
 * and thus don't have or would rather us not use the stdio types:
 * stdin, stdout, and stderr.  The only one currently used is stderr
 * in png_error() and png_warning().  #defining PNG_NO_CONSOLE_IO will
 * prevent these from being compiled and used. #defining PNG_NO_STDIO
 * will also prevent these, plus will prevent the entire set of stdio
 * macros and functions (FILE *, printf, etc.) from being compiled and used,
 * unless (PNG_DEBUG > 0) has been #defined.
 *
 * #define PNG_NO_CONSOLE_IO
 * #define PNG_NO_STDIO
 */

    #if !defined (PNG_NO_STDIO) && !defined (PNG_STDIO_SUPPORTED)
        #define PNG_STDIO_SUPPORTED
    #endif


    #ifdef PNG_BUILD_DLL
        #if !defined (PNG_CONSOLE_IO_SUPPORTED) && !defined (PNG_NO_CONSOLE_IO)
            #define PNG_NO_CONSOLE_IO
        #endif
    #endif

    #ifdef PNG_NO_STDIO
        #ifndef PNG_NO_CONSOLE_IO
            #define PNG_NO_CONSOLE_IO
        #endif
        #ifdef PNG_DEBUG
            #if (PNG_DEBUG > 0)
                #include <stdio.h>
            #endif
        #endif
    #else
        #include <stdio.h>
    #endif

    #if !(defined PNG_NO_CONSOLE_IO) && !defined (PNG_CONSOLE_IO_SUPPORTED)
        #define PNG_CONSOLE_IO_SUPPORTED
    #endif

/* This macro protects us against machines that don't have function
 * prototypes (ie K&R style headers).  If your compiler does not handle
 * function prototypes, define this macro and use the included ansi2knr.
 * I've always been able to use _NO_PROTO as the indicator, but you may
 * need to drag the empty declaration out in front of here, or change the
 * ifdef to suit your own needs.
 */
    #ifndef PNGARG

        #ifdef OF /* zlib prototype munger */
            #define PNGARG(arglist) OF(arglist)
        #else

            #ifdef _NO_PROTO
                #define PNGARG(arglist) ()
            #else
                #define PNGARG(arglist) arglist
            #endif /* _NO_PROTO */

        #endif /* OF */

    #endif /* PNGARG */

/* Try to determine if we are compiling on a Mac.  Note that testing for
 * just __MWERKS__ is not good enough, because the Codewarrior is now used
 * on non-Mac platforms.
 */
    #ifndef MACOS
        #if (defined (__MWERKS__) && defined (macintosh)) || defined (applec) || \
    defined (THINK_C) || defined (__SC__) || defined (TARGET_OS_MAC)
            #define MACOS
        #endif
    #endif

/* Enough people need this for various reasons to include it here */
    #if !defined (MACOS) && !defined (RISCOS)
        #include <sys/types.h>
    #endif

/* PNG_SETJMP_NOT_SUPPORTED and PNG_NO_SETJMP_SUPPORTED are deprecated. */
    #if !defined (PNG_NO_SETJMP) && \
    !defined (PNG_SETJMP_NOT_SUPPORTED) && !defined (PNG_NO_SETJMP_SUPPORTED)
        #define PNG_SETJMP_SUPPORTED
    #endif

    #ifdef PNG_SETJMP_SUPPORTED
/* This is an attempt to force a single setjmp behaviour on Linux.  If
 * the X config stuff didn't define _BSD_SOURCE we wouldn't need this.
 *
 * You can bypass this test if you know that your application uses exactly
 * the same setjmp.h that was included when libpng was built.  Only define
 * PNG_SKIP_SETJMP_CHECK while building your application, prior to the
 * application's '#include "png.h"'. Don't define PNG_SKIP_SETJMP_CHECK
 * while building a separate libpng library for general use.
 */

        #ifndef PNG_SKIP_SETJMP_CHECK
            #ifdef __linux__
                #ifdef _BSD_SOURCE
                    #define PNG_SAVE_BSD_SOURCE
                    #undef _BSD_SOURCE
                #endif
                #ifdef _SETJMP_H
/* If you encounter a compiler error here, see the explanation
 * near the end of INSTALL.
 */
__pngconf.h__ in libpng already includes setjmp.h;
__dont__ include it again.;
                #endif
            #endif /* __linux__ */
        #endif /* PNG_SKIP_SETJMP_CHECK */

/* Include setjmp.h for error handling */
        #include <setjmp.h>

        #ifdef __linux__
            #ifdef PNG_SAVE_BSD_SOURCE
                #ifdef _BSD_SOURCE
                    #undef _BSD_SOURCE
                #endif
                #define _BSD_SOURCE
                #undef PNG_SAVE_BSD_SOURCE
            #endif
        #endif /* __linux__ */
    #endif /* PNG_SETJMP_SUPPORTED */

    #ifdef BSD
        #include <strings.h>
    #else
        #include <string.h>
    #endif

/* Other defines for things like memory and the like can go here.  */

/* This controls how fine the quantizing gets.  As this allocates
 * a largish chunk of memory (32K), those who are not as concerned
 * with quantizing quality can decrease some or all of these.
 */

/* Prior to libpng-1.4.2, these were PNG_DITHER_*_BITS
 * These migration aids will be removed from libpng-1.5.0.
 */
    #ifdef PNG_DITHER_RED_BITS
        #define PNG_QUANTIZE_RED_BITS PNG_DITHER_RED_BITS
    #endif
    #ifdef PNG_DITHER_GREEN_BITS
        #define PNG_QUANTIZE_GREEN_BITS PNG_DITHER_GREEN_BITS
    #endif
    #ifdef PNG_DITHER_BLUE_BITS
        #define PNG_QUANTIZE_BLUE_BITS PNG_DITHER_BLUE_BITS
    #endif

    #ifndef PNG_QUANTIZE_RED_BITS
        #define PNG_QUANTIZE_RED_BITS 5
    #endif
    #ifndef PNG_QUANTIZE_GREEN_BITS
        #define PNG_QUANTIZE_GREEN_BITS 5
    #endif
    #ifndef PNG_QUANTIZE_BLUE_BITS
        #define PNG_QUANTIZE_BLUE_BITS 5
    #endif

/* This controls how fine the gamma correction becomes when you
 * are only interested in 8 bits anyway.  Increasing this value
 * results in more memory being used, and more pow() functions
 * being called to fill in the gamma tables.  Don't set this value
 * less then 8, and even that may not work (I haven't tested it).
 */

    #ifndef PNG_MAX_GAMMA_8
        #define PNG_MAX_GAMMA_8 11
    #endif

/* This controls how much a difference in gamma we can tolerate before
 * we actually start doing gamma conversion.
 */
    #ifndef PNG_GAMMA_THRESHOLD
        #define PNG_GAMMA_THRESHOLD 0.05
    #endif

/* The following uses const char * instead of char * for error
 * and warning message functions, so some compilers won't complain.
 * If you do not want to use const, define PNG_NO_CONST here.
 */

    #ifndef PNG_CONST
        #ifndef PNG_NO_CONST
            #define PNG_CONST const
        #else
            #define PNG_CONST
        #endif
    #endif

/* The following defines give you the ability to remove code from the
 * library that you will not be using.  I wish I could figure out how to
 * automate this, but I can't do that without making it seriously hard
 * on the users.  So if you are not using an ability, change the #define
 * to and #undef, and that part of the library will not be compiled.  If
 * your linker can't find a function, you may want to make sure the
 * ability is defined here.  Some of these depend upon some others being
 * defined.  I haven't figured out all the interactions here, so you may
 * have to experiment awhile to get everything to compile.  If you are
 * creating or using a shared library, you probably shouldn't touch this,
 * as it will affect the size of the structures, and this will cause bad
 * things to happen if the library and/or application ever change.
 */

/* Any features you will not be using can be undef'ed here */

/* GR-P, 0.96a: Set "*TRANSFORMS_SUPPORTED as default but allow user
 * to turn it off with PNG_NO_READ|WRITE_TRANSFORMS on the compile line,
 * then pick and choose which ones to define without having to edit this
 * file. It is safe to use the PNG_NO_READ|WRITE_TRANSFORMS
 * if you only want to have a png-compliant reader/writer but don't need
 * any of the extra transformations.  This saves about 80 kbytes in a
 * typical installation of the library. (PNG_NO_* form added in version
 * 1.0.1c, for consistency; PNG_*_TRANSFORMS_NOT_SUPPORTED deprecated in
 * 1.4.0)
 */

/* Ignore attempt to turn off both floating and fixed point support */
    #if !defined (PNG_FLOATING_POINT_SUPPORTED) || \
    !defined (PNG_NO_FIXED_POINT_SUPPORTED)
        #define PNG_FIXED_POINT_SUPPORTED
    #endif

    #ifdef PNG_READ_SUPPORTED

/* PNG_READ_TRANSFORMS_NOT_SUPPORTED is deprecated. */
        #if !defined (PNG_READ_TRANSFORMS_NOT_SUPPORTED) && \
    !defined (PNG_NO_READ_TRANSFORMS)
            #define PNG_READ_TRANSFORMS_SUPPORTED
        #endif

        #ifdef PNG_READ_TRANSFORMS_SUPPORTED
            #ifndef PNG_NO_READ_EXPAND
                #define PNG_READ_EXPAND_SUPPORTED
            #endif
            #ifndef PNG_NO_READ_SHIFT
                #define PNG_READ_SHIFT_SUPPORTED
            #endif
            #ifndef PNG_NO_READ_PACK
                #define PNG_READ_PACK_SUPPORTED
            #endif
            #ifndef PNG_NO_READ_BGR
                #define PNG_READ_BGR_SUPPORTED
            #endif
            #ifndef PNG_NO_READ_SWAP
                #define PNG_READ_SWAP_SUPPORTED
            #endif
            #ifndef PNG_NO_READ_PACKSWAP
                #define PNG_READ_PACKSWAP_SUPPORTED
            #endif
            #ifndef PNG_NO_READ_INVERT
                #define PNG_READ_INVERT_SUPPORTED
            #endif
            #ifndef PNG_NO_READ_QUANTIZE
/* Prior to libpng-1.4.0 this was PNG_READ_DITHER_SUPPORTED */
                #ifndef PNG_NO_READ_DITHER /* This migration aid will be removed */
                    #define PNG_READ_QUANTIZE_SUPPORTED
                #endif
            #endif
            #ifndef PNG_NO_READ_BACKGROUND
                #define PNG_READ_BACKGROUND_SUPPORTED
            #endif
            #ifndef PNG_NO_READ_16_TO_8
                #define PNG_READ_16_TO_8_SUPPORTED
            #endif
            #ifndef PNG_NO_READ_FILLER
                #define PNG_READ_FILLER_SUPPORTED
            #endif
            #ifndef PNG_NO_READ_GAMMA
                #define PNG_READ_GAMMA_SUPPORTED
            #endif
            #ifndef PNG_NO_READ_GRAY_TO_RGB
                #define PNG_READ_GRAY_TO_RGB_SUPPORTED
            #endif
            #ifndef PNG_NO_READ_SWAP_ALPHA
                #define PNG_READ_SWAP_ALPHA_SUPPORTED
            #endif
            #ifndef PNG_NO_READ_INVERT_ALPHA
                #define PNG_READ_INVERT_ALPHA_SUPPORTED
            #endif
            #ifndef PNG_NO_READ_STRIP_ALPHA
                #define PNG_READ_STRIP_ALPHA_SUPPORTED
            #endif
            #ifndef PNG_NO_READ_USER_TRANSFORM
                #define PNG_READ_USER_TRANSFORM_SUPPORTED
            #endif
            #ifndef PNG_NO_READ_RGB_TO_GRAY
                #define PNG_READ_RGB_TO_GRAY_SUPPORTED
            #endif
        #endif /* PNG_READ_TRANSFORMS_SUPPORTED */

/* PNG_PROGRESSIVE_READ_NOT_SUPPORTED is deprecated. */
        #if !defined (PNG_NO_PROGRESSIVE_READ) && \
    !defined (PNG_PROGRESSIVE_READ_NOT_SUPPORTED) /* if you don't do progressive */
            #define PNG_PROGRESSIVE_READ_SUPPORTED /* reading.  This is not talking */
        #endif                       /* about interlacing capability!  You'll */
/* still have interlacing unless you change the following define: */

        #define PNG_READ_INTERLACING_SUPPORTED /* required for PNG-compliant decoders */

/* PNG_NO_SEQUENTIAL_READ_SUPPORTED is deprecated. */
        #if !defined (PNG_NO_SEQUENTIAL_READ) && \
    !defined (PNG_SEQUENTIAL_READ_SUPPORTED) && \
    !defined (PNG_NO_SEQUENTIAL_READ_SUPPORTED)
            #define PNG_SEQUENTIAL_READ_SUPPORTED
        #endif

        #ifndef PNG_NO_READ_COMPOSITE_NODIV
            #ifndef PNG_NO_READ_COMPOSITED_NODIV /* libpng-1.0.x misspelling */
                #define PNG_READ_COMPOSITE_NODIV_SUPPORTED /* well tested on Intel, SGI */
            #endif
        #endif

        #if !defined (PNG_NO_GET_INT_32) || defined (PNG_READ_oFFS_SUPPORTED) || \
    defined (PNG_READ_pCAL_SUPPORTED)
            #ifndef PNG_GET_INT_32_SUPPORTED
                #define PNG_GET_INT_32_SUPPORTED
            #endif
        #endif

    #endif /* PNG_READ_SUPPORTED */

    #ifdef PNG_WRITE_SUPPORTED

/* PNG_WRITE_TRANSFORMS_NOT_SUPPORTED is deprecated. */
        #if !defined (PNG_WRITE_TRANSFORMS_NOT_SUPPORTED) && \
    !defined (PNG_NO_WRITE_TRANSFORMS)
            #define PNG_WRITE_TRANSFORMS_SUPPORTED
        #endif

        #ifdef PNG_WRITE_TRANSFORMS_SUPPORTED
            #ifndef PNG_NO_WRITE_SHIFT
                #define PNG_WRITE_SHIFT_SUPPORTED
            #endif
            #ifndef PNG_NO_WRITE_PACK
                #define PNG_WRITE_PACK_SUPPORTED
            #endif
            #ifndef PNG_NO_WRITE_BGR
                #define PNG_WRITE_BGR_SUPPORTED
            #endif
            #ifndef PNG_NO_WRITE_SWAP
                #define PNG_WRITE_SWAP_SUPPORTED
            #endif
            #ifndef PNG_NO_WRITE_PACKSWAP
                #define PNG_WRITE_PACKSWAP_SUPPORTED
            #endif
            #ifndef PNG_NO_WRITE_INVERT
                #define PNG_WRITE_INVERT_SUPPORTED
            #endif
            #ifndef PNG_NO_WRITE_FILLER
                #define PNG_WRITE_FILLER_SUPPORTED /* same as WRITE_STRIP_ALPHA */
            #endif
            #ifndef PNG_NO_WRITE_SWAP_ALPHA
                #define PNG_WRITE_SWAP_ALPHA_SUPPORTED
            #endif
            #ifndef PNG_NO_WRITE_INVERT_ALPHA
                #define PNG_WRITE_INVERT_ALPHA_SUPPORTED
            #endif
            #ifndef PNG_NO_WRITE_USER_TRANSFORM
                #define PNG_WRITE_USER_TRANSFORM_SUPPORTED
            #endif
        #endif /* PNG_WRITE_TRANSFORMS_SUPPORTED */

        #if !defined (PNG_NO_WRITE_INTERLACING_SUPPORTED) && \
    !defined (PNG_WRITE_INTERLACING_SUPPORTED)
/* This is not required for PNG-compliant encoders, but can cause
 * trouble if left undefined
 */
            #define PNG_WRITE_INTERLACING_SUPPORTED
        #endif

        #if !defined (PNG_NO_WRITE_WEIGHTED_FILTER) && \
    !defined (PNG_WRITE_WEIGHTED_FILTER) && \
    defined (PNG_FLOATING_POINT_SUPPORTED)
            #define PNG_WRITE_WEIGHTED_FILTER_SUPPORTED
        #endif

        #ifndef PNG_NO_WRITE_FLUSH
            #define PNG_WRITE_FLUSH_SUPPORTED
        #endif

        #if !defined (PNG_NO_SAVE_INT_32) || defined (PNG_WRITE_oFFS_SUPPORTED) || \
    defined (PNG_WRITE_pCAL_SUPPORTED)
            #ifndef PNG_SAVE_INT_32_SUPPORTED
                #define PNG_SAVE_INT_32_SUPPORTED
            #endif
        #endif

    #endif /* PNG_WRITE_SUPPORTED */

    #define PNG_NO_ERROR_NUMBERS

    #if defined (PNG_READ_USER_TRANSFORM_SUPPORTED) || \
    defined (PNG_WRITE_USER_TRANSFORM_SUPPORTED)
        #ifndef PNG_NO_USER_TRANSFORM_PTR
            #define PNG_USER_TRANSFORM_PTR_SUPPORTED
        #endif
    #endif

    #if defined (PNG_STDIO_SUPPORTED) && !defined (PNG_TIME_RFC1123_SUPPORTED)
        #define PNG_TIME_RFC1123_SUPPORTED
    #endif

/* This adds extra functions in pngget.c for accessing data from the
 * info pointer (added in version 0.99)
 * png_get_image_width()
 * png_get_image_height()
 * png_get_bit_depth()
 * png_get_color_type()
 * png_get_compression_type()
 * png_get_filter_type()
 * png_get_interlace_type()
 * png_get_pixel_aspect_ratio()
 * png_get_pixels_per_meter()
 * png_get_x_offset_pixels()
 * png_get_y_offset_pixels()
 * png_get_x_offset_microns()
 * png_get_y_offset_microns()
 */
    #if !defined (PNG_NO_EASY_ACCESS) && !defined (PNG_EASY_ACCESS_SUPPORTED)
        #define PNG_EASY_ACCESS_SUPPORTED
    #endif

/* Added at libpng-1.2.0 */
    #if !defined (PNG_NO_USER_MEM) && !defined (PNG_USER_MEM_SUPPORTED)
        #define PNG_USER_MEM_SUPPORTED
    #endif

/* Added at libpng-1.2.6 */
    #ifndef PNG_NO_SET_USER_LIMITS
        #ifndef PNG_SET_USER_LIMITS_SUPPORTED
            #define PNG_SET_USER_LIMITS_SUPPORTED
        #endif
/* Feature added at libpng-1.4.0, this flag added at 1.4.1 */
        #ifndef PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED
            #define PNG_SET_CHUNK_CACHE_LIMIT_SUPPORTED
        #endif
/* Feature added at libpng-1.4.1, this flag added at 1.4.1 */
        #ifndef PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
            #define PNG_SET_CHUNK_MALLOC_LIMIT_SUPPORTED
        #endif
    #endif

/* Added at libpng-1.2.43 */
    #ifndef PNG_USER_LIMITS_SUPPORTED
        #ifndef PNG_NO_USER_LIMITS
            #define PNG_USER_LIMITS_SUPPORTED
        #endif
    #endif

/* Added at libpng-1.0.16 and 1.2.6.  To accept all valid PNGs no matter
 * how large, set these two limits to 0x7fffffffL
 */
    #ifndef PNG_USER_WIDTH_MAX
        #define PNG_USER_WIDTH_MAX 1000000L
    #endif
    #ifndef PNG_USER_HEIGHT_MAX
        #define PNG_USER_HEIGHT_MAX 1000000L
    #endif

/* Added at libpng-1.2.43.  To accept all valid PNGs no matter
 * how large, set these two limits to 0.
 */
    #ifndef PNG_USER_CHUNK_CACHE_MAX
        #define PNG_USER_CHUNK_CACHE_MAX 0
    #endif

/* Added at libpng-1.2.43 */
    #ifndef PNG_USER_CHUNK_MALLOC_MAX
        #define PNG_USER_CHUNK_MALLOC_MAX 0
    #endif

/* Added at libpng-1.4.0 */
    #if !defined (PNG_NO_IO_STATE) && !defined (PNG_IO_STATE_SUPPORTED)
        #define PNG_IO_STATE_SUPPORTED
    #endif

    #ifndef PNG_LITERAL_SHARP
        #define PNG_LITERAL_SHARP 0x23
    #endif
    #ifndef PNG_LITERAL_LEFT_SQUARE_BRACKET
        #define PNG_LITERAL_LEFT_SQUARE_BRACKET 0x5b
    #endif
    #ifndef PNG_LITERAL_RIGHT_SQUARE_BRACKET
        #define PNG_LITERAL_RIGHT_SQUARE_BRACKET 0x5d
    #endif
    #ifndef PNG_STRING_NEWLINE
        #define PNG_STRING_NEWLINE "\n"
    #endif

/* These are currently experimental features, define them if you want */

/* Very little testing */
/*
 #ifdef PNG_READ_SUPPORTED
 #ifndef PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 #define PNG_READ_16_TO_8_ACCURATE_SCALE_SUPPORTED
 #endif
 #endif
 */

/* This is only for PowerPC big-endian and 680x0 systems */
/* some testing */
/*
 #ifndef PNG_READ_BIG_ENDIAN_SUPPORTED
 #define PNG_READ_BIG_ENDIAN_SUPPORTED
 #endif
 */

    #if !defined (PNG_NO_USE_READ_MACROS) && !defined (PNG_USE_READ_MACROS)
        #define PNG_USE_READ_MACROS
    #endif

/* Buggy compilers (e.g., gcc 2.7.2.2) need PNG_NO_POINTER_INDEXING */

    #if !defined (PNG_NO_POINTER_INDEXING) && \
    !defined (PNG_POINTER_INDEXING_SUPPORTED)
        #define PNG_POINTER_INDEXING_SUPPORTED
    #endif


/* Any chunks you are not interested in, you can undef here.  The
 * ones that allocate memory may be expecially important (hIST,
 * tEXt, zTXt, tRNS, pCAL).  Others will just save time and make png_info
 * a bit smaller.
 */

/* The size of the png_text structure changed in libpng-1.0.6 when
 * iTXt support was added.  iTXt support was turned off by default through
 * libpng-1.2.x, to support old apps that malloc the png_text structure
 * instead of calling png_set_text() and letting libpng malloc it.  It
 * was turned on by default in libpng-1.4.0.
 */

/* PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED is deprecated. */
    #if defined (PNG_READ_SUPPORTED) && \
    !defined (PNG_READ_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
    !defined (PNG_NO_READ_ANCILLARY_CHUNKS)
        #define PNG_READ_ANCILLARY_CHUNKS_SUPPORTED
    #endif

/* PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED is deprecated. */
    #if defined (PNG_WRITE_SUPPORTED) && \
    !defined (PNG_WRITE_ANCILLARY_CHUNKS_NOT_SUPPORTED) && \
    !defined (PNG_NO_WRITE_ANCILLARY_CHUNKS)
        #define PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED
    #endif

    #ifdef PNG_READ_ANCILLARY_CHUNKS_SUPPORTED

        #ifdef PNG_NO_READ_TEXT
            #define PNG_NO_READ_iTXt
            #define PNG_NO_READ_tEXt
            #define PNG_NO_READ_zTXt
        #endif

        #ifndef PNG_NO_READ_bKGD
            #define PNG_READ_bKGD_SUPPORTED
            #define PNG_bKGD_SUPPORTED
        #endif
        #ifndef PNG_NO_READ_cHRM
            #define PNG_READ_cHRM_SUPPORTED
            #define PNG_cHRM_SUPPORTED
        #endif
        #ifndef PNG_NO_READ_gAMA
            #define PNG_READ_gAMA_SUPPORTED
            #define PNG_gAMA_SUPPORTED
        #endif
        #ifndef PNG_NO_READ_hIST
            #define PNG_READ_hIST_SUPPORTED
            #define PNG_hIST_SUPPORTED
        #endif
        #ifndef PNG_NO_READ_iCCP
            #define PNG_READ_iCCP_SUPPORTED
            #define PNG_iCCP_SUPPORTED
        #endif
        #ifndef PNG_NO_READ_iTXt
            #ifndef PNG_READ_iTXt_SUPPORTED
                #define PNG_READ_iTXt_SUPPORTED
            #endif
            #ifndef PNG_iTXt_SUPPORTED
                #define PNG_iTXt_SUPPORTED
            #endif
        #endif
        #ifndef PNG_NO_READ_oFFs
            #define PNG_READ_oFFs_SUPPORTED
            #define PNG_oFFs_SUPPORTED
        #endif
        #ifndef PNG_NO_READ_pCAL
            #define PNG_READ_pCAL_SUPPORTED
            #define PNG_pCAL_SUPPORTED
        #endif
        #ifndef PNG_NO_READ_sCAL
            #define PNG_READ_sCAL_SUPPORTED
            #define PNG_sCAL_SUPPORTED
        #endif
        #ifndef PNG_NO_READ_pHYs
            #define PNG_READ_pHYs_SUPPORTED
            #define PNG_pHYs_SUPPORTED
        #endif
        #ifndef PNG_NO_READ_sBIT
            #define PNG_READ_sBIT_SUPPORTED
            #define PNG_sBIT_SUPPORTED
        #endif
        #ifndef PNG_NO_READ_sPLT
            #define PNG_READ_sPLT_SUPPORTED
            #define PNG_sPLT_SUPPORTED
        #endif
        #ifndef PNG_NO_READ_sRGB
            #define PNG_READ_sRGB_SUPPORTED
            #define PNG_sRGB_SUPPORTED
        #endif
        #ifndef PNG_NO_READ_tEXt
            #define PNG_READ_tEXt_SUPPORTED
            #define PNG_tEXt_SUPPORTED
        #endif
        #ifndef PNG_NO_READ_tIME
            #define PNG_READ_tIME_SUPPORTED
            #define PNG_tIME_SUPPORTED
        #endif
        #ifndef PNG_NO_READ_tRNS
            #define PNG_READ_tRNS_SUPPORTED
            #define PNG_tRNS_SUPPORTED
        #endif
        #ifndef PNG_NO_READ_zTXt
            #define PNG_READ_zTXt_SUPPORTED
            #define PNG_zTXt_SUPPORTED
        #endif
        #ifndef PNG_NO_READ_OPT_PLTE
            #define PNG_READ_OPT_PLTE_SUPPORTED /* only affects support of the */
        #endif              /* optional PLTE chunk in RGB and RGBA images */
        #if defined (PNG_READ_iTXt_SUPPORTED) || defined (PNG_READ_tEXt_SUPPORTED) || \
    defined (PNG_READ_zTXt_SUPPORTED)
            #define PNG_READ_TEXT_SUPPORTED
            #define PNG_TEXT_SUPPORTED
        #endif

    #endif /* PNG_READ_ANCILLARY_CHUNKS_SUPPORTED */

    #ifndef PNG_NO_READ_UNKNOWN_CHUNKS
        #ifndef PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
            #define PNG_READ_UNKNOWN_CHUNKS_SUPPORTED
        #endif
        #ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
            #define PNG_UNKNOWN_CHUNKS_SUPPORTED
        #endif
        #ifndef PNG_READ_USER_CHUNKS_SUPPORTED
            #define PNG_READ_USER_CHUNKS_SUPPORTED
        #endif
    #endif
    #ifndef PNG_NO_READ_USER_CHUNKS
        #ifndef PNG_READ_USER_CHUNKS_SUPPORTED
            #define PNG_READ_USER_CHUNKS_SUPPORTED
        #endif
        #ifndef PNG_USER_CHUNKS_SUPPORTED
            #define PNG_USER_CHUNKS_SUPPORTED
        #endif
    #endif
    #ifndef PNG_NO_HANDLE_AS_UNKNOWN
        #ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
            #define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
        #endif
    #endif

    #ifdef PNG_WRITE_SUPPORTED
        #ifdef PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED

            #ifdef PNG_NO_WRITE_TEXT
                #define PNG_NO_WRITE_iTXt
                #define PNG_NO_WRITE_tEXt
                #define PNG_NO_WRITE_zTXt
            #endif
            #ifndef PNG_NO_WRITE_bKGD
                #define PNG_WRITE_bKGD_SUPPORTED
                #ifndef PNG_bKGD_SUPPORTED
                    #define PNG_bKGD_SUPPORTED
                #endif
            #endif
            #ifndef PNG_NO_WRITE_cHRM
                #define PNG_WRITE_cHRM_SUPPORTED
                #ifndef PNG_cHRM_SUPPORTED
                    #define PNG_cHRM_SUPPORTED
                #endif
            #endif
            #ifndef PNG_NO_WRITE_gAMA
                #define PNG_WRITE_gAMA_SUPPORTED
                #ifndef PNG_gAMA_SUPPORTED
                    #define PNG_gAMA_SUPPORTED
                #endif
            #endif
            #ifndef PNG_NO_WRITE_hIST
                #define PNG_WRITE_hIST_SUPPORTED
                #ifndef PNG_hIST_SUPPORTED
                    #define PNG_hIST_SUPPORTED
                #endif
            #endif
            #ifndef PNG_NO_WRITE_iCCP
                #define PNG_WRITE_iCCP_SUPPORTED
                #ifndef PNG_iCCP_SUPPORTED
                    #define PNG_iCCP_SUPPORTED
                #endif
            #endif
            #ifndef PNG_NO_WRITE_iTXt
                #ifndef PNG_WRITE_iTXt_SUPPORTED
                    #define PNG_WRITE_iTXt_SUPPORTED
                #endif
                #ifndef PNG_iTXt_SUPPORTED
                    #define PNG_iTXt_SUPPORTED
                #endif
            #endif
            #ifndef PNG_NO_WRITE_oFFs
                #define PNG_WRITE_oFFs_SUPPORTED
                #ifndef PNG_oFFs_SUPPORTED
                    #define PNG_oFFs_SUPPORTED
                #endif
            #endif
            #ifndef PNG_NO_WRITE_pCAL
                #define PNG_WRITE_pCAL_SUPPORTED
                #ifndef PNG_pCAL_SUPPORTED
                    #define PNG_pCAL_SUPPORTED
                #endif
            #endif
            #ifndef PNG_NO_WRITE_sCAL
                #define PNG_WRITE_sCAL_SUPPORTED
                #ifndef PNG_sCAL_SUPPORTED
                    #define PNG_sCAL_SUPPORTED
                #endif
            #endif
            #ifndef PNG_NO_WRITE_pHYs
                #define PNG_WRITE_pHYs_SUPPORTED
                #ifndef PNG_pHYs_SUPPORTED
                    #define PNG_pHYs_SUPPORTED
                #endif
            #endif
            #ifndef PNG_NO_WRITE_sBIT
                #define PNG_WRITE_sBIT_SUPPORTED
                #ifndef PNG_sBIT_SUPPORTED
                    #define PNG_sBIT_SUPPORTED
                #endif
            #endif
            #ifndef PNG_NO_WRITE_sPLT
                #define PNG_WRITE_sPLT_SUPPORTED
                #ifndef PNG_sPLT_SUPPORTED
                    #define PNG_sPLT_SUPPORTED
                #endif
            #endif
            #ifndef PNG_NO_WRITE_sRGB
                #define PNG_WRITE_sRGB_SUPPORTED
                #ifndef PNG_sRGB_SUPPORTED
                    #define PNG_sRGB_SUPPORTED
                #endif
            #endif
            #ifndef PNG_NO_WRITE_tEXt
                #define PNG_WRITE_tEXt_SUPPORTED
                #ifndef PNG_tEXt_SUPPORTED
                    #define PNG_tEXt_SUPPORTED
                #endif
            #endif
            #ifndef PNG_NO_WRITE_tIME
                #define PNG_WRITE_tIME_SUPPORTED
                #ifndef PNG_tIME_SUPPORTED
                    #define PNG_tIME_SUPPORTED
                #endif
            #endif
            #ifndef PNG_NO_WRITE_tRNS
                #define PNG_WRITE_tRNS_SUPPORTED
                #ifndef PNG_tRNS_SUPPORTED
                    #define PNG_tRNS_SUPPORTED
                #endif
            #endif
            #ifndef PNG_NO_WRITE_zTXt
                #define PNG_WRITE_zTXt_SUPPORTED
                #ifndef PNG_zTXt_SUPPORTED
                    #define PNG_zTXt_SUPPORTED
                #endif
            #endif
            #if defined (PNG_WRITE_iTXt_SUPPORTED) || defined (PNG_WRITE_tEXt_SUPPORTED) || \
    defined (PNG_WRITE_zTXt_SUPPORTED)
                #define PNG_WRITE_TEXT_SUPPORTED
                #ifndef PNG_TEXT_SUPPORTED
                    #define PNG_TEXT_SUPPORTED
                #endif
            #endif

            #ifdef PNG_WRITE_tIME_SUPPORTED
                #ifndef PNG_NO_CONVERT_tIME
                    #ifndef _WIN32_WCE
/*   The "tm" structure is not supported on WindowsCE */
                        #ifndef PNG_CONVERT_tIME_SUPPORTED
                            #define PNG_CONVERT_tIME_SUPPORTED
                        #endif
                    #endif
                #endif
            #endif

        #endif /* PNG_WRITE_ANCILLARY_CHUNKS_SUPPORTED */

        #ifndef PNG_NO_WRITE_FILTER
            #ifndef PNG_WRITE_FILTER_SUPPORTED
                #define PNG_WRITE_FILTER_SUPPORTED
            #endif
        #endif

        #ifndef PNG_NO_WRITE_UNKNOWN_CHUNKS
            #define PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED
            #ifndef PNG_UNKNOWN_CHUNKS_SUPPORTED
                #define PNG_UNKNOWN_CHUNKS_SUPPORTED
            #endif
        #endif
        #ifndef PNG_NO_HANDLE_AS_UNKNOWN
            #ifndef PNG_HANDLE_AS_UNKNOWN_SUPPORTED
                #define PNG_HANDLE_AS_UNKNOWN_SUPPORTED
            #endif
        #endif
    #endif /* PNG_WRITE_SUPPORTED */

/* Turn this off to disable png_read_png() and
 * png_write_png() and leave the row_pointers member
 * out of the info structure.
 */
    #ifndef PNG_NO_INFO_IMAGE
        #define PNG_INFO_IMAGE_SUPPORTED
    #endif

/* Need the time information for converting tIME chunks */
    #ifdef PNG_CONVERT_tIME_SUPPORTED
/* "time.h" functions are not supported on WindowsCE */
        #include <time.h>
    #endif

/* Some typedefs to get us started.  These should be safe on most of the
 * common platforms.  The typedefs should be at least as large as the
 * numbers suggest (a png_uint_32 must be at least 32 bits long), but they
 * don't have to be exactly that size.  Some compilers dislike passing
 * unsigned shorts as function parameters, so you may be better off using
 * unsigned int for png_uint_16.
 */

    #if defined (INT_MAX) && (INT_MAX > 0x7ffffffeL)
typedef unsigned int png_uint_32;
typedef int png_int_32;
    #else
typedef unsigned long png_uint_32;
typedef long png_int_32;
    #endif
typedef unsigned short png_uint_16;
typedef short png_int_16;
typedef unsigned char png_byte;

    #ifdef PNG_NO_SIZE_T
typedef unsigned int png_size_t;
    #else
typedef size_t png_size_t;
    #endif
    #define png_sizeof(x) sizeof(x)

/* The following is needed for medium model support.  It cannot be in the
 * pngpriv.h header.  Needs modification for other compilers besides
 * MSC.  Model independent support declares all arrays and pointers to be
 * large using the far keyword.  The zlib version used must also support
 * model independent data.  As of version zlib 1.0.4, the necessary changes
 * have been made in zlib.  The USE_FAR_KEYWORD define triggers other
 * changes that are needed. (Tim Wegner)
 */

/* Separate compiler dependencies (problem here is that zlib.h always
 * defines FAR. (SJT)
 */
    #ifdef __BORLANDC__
        #if defined (__LARGE__) || defined (__HUGE__) || defined (__COMPACT__)
            #define LDATA 1
        #else
            #define LDATA 0
        #endif
/* GRR:  why is Cygwin in here?  Cygwin is not Borland C... */
        #if !defined (__WIN32__) && !defined (__FLAT__) && !defined (__CYGWIN__)
            #define PNG_MAX_MALLOC_64K
            #if (LDATA != 1)
                #ifndef FAR
                    #define FAR __far
                #endif
                #define USE_FAR_KEYWORD
            #endif /* LDATA != 1 */
/* Possibly useful for moving data out of default segment.
 * Uncomment it if you want. Could also define FARDATA as
 * const if your compiler supports it. (SJT)
 #define FARDATA FAR
 */
        #endif /* __WIN32__, __FLAT__, __CYGWIN__ */
    #endif /* __BORLANDC__ */


/* Suggest testing for specific compiler first before testing for
 * FAR.  The Watcom compiler defines both __MEDIUM__ and M_I86MM,
 * making reliance oncertain keywords suspect. (SJT)
 */

/* MSC Medium model */
    #ifdef FAR
        #ifdef M_I86MM
            #define USE_FAR_KEYWORD
            #define FARDATA FAR
            #include <dos.h>
        #endif
    #endif

/* SJT: default case */
    #ifndef FAR
        #define FAR
    #endif

/* At this point FAR is always defined */
    #ifndef FARDATA
        #define FARDATA
    #endif

/* Typedef for floating-point numbers that are converted
   to fixed-point with a multiple of 100,000, e.g., int_gamma */
typedef png_int_32 png_fixed_point;

/* Add typedefs for pointers */
typedef void FAR* png_voidp;
typedef png_byte FAR* png_bytep;
typedef png_uint_32 FAR* png_uint_32p;
typedef png_int_32 FAR* png_int_32p;
typedef png_uint_16 FAR* png_uint_16p;
typedef png_int_16 FAR* png_int_16p;
typedef PNG_CONST char FAR* png_const_charp;
typedef char FAR* png_charp;
typedef png_fixed_point FAR* png_fixed_point_p;

    #ifndef PNG_NO_STDIO
typedef FILE* png_FILE_p;
    #endif

    #ifdef PNG_FLOATING_POINT_SUPPORTED
typedef double FAR* png_doublep;
    #endif

/* Pointers to pointers; i.e. arrays */
typedef png_byte FAR* FAR* png_bytepp;
typedef png_uint_32 FAR* FAR* png_uint_32pp;
typedef png_int_32 FAR* FAR* png_int_32pp;
typedef png_uint_16 FAR* FAR* png_uint_16pp;
typedef png_int_16 FAR* FAR* png_int_16pp;
typedef PNG_CONST char FAR* FAR* png_const_charpp;
typedef char FAR* FAR* png_charpp;
typedef png_fixed_point FAR* FAR* png_fixed_point_pp;
    #ifdef PNG_FLOATING_POINT_SUPPORTED
typedef double FAR* FAR* png_doublepp;
    #endif

/* Pointers to pointers to pointers; i.e., pointer to array */
typedef char FAR* FAR* FAR* png_charppp;

/* Define PNG_BUILD_DLL if the module being built is a Windows
 * LIBPNG DLL.
 *
 * Define PNG_USE_DLL if you want to *link* to the Windows LIBPNG DLL.
 * It is equivalent to Microsoft predefined macro _DLL that is
 * automatically defined when you compile using the share
 * version of the CRT (C Run-Time library)
 *
 * The cygwin mods make this behavior a little different:
 * Define PNG_BUILD_DLL if you are building a dll for use with cygwin
 * Define PNG_STATIC if you are building a static library for use with cygwin,
 *   -or- if you are building an application that you want to link to the
 *   static library.
 * PNG_USE_DLL is defined by default (no user action needed) unless one of
 *   the other flags is defined.
 */

    #if !defined (PNG_DLL) && (defined (PNG_BUILD_DLL) || defined (PNG_USE_DLL))
        #define PNG_DLL
    #endif

    #ifdef __CYGWIN__
        #undef PNGAPI
        #define PNGAPI __cdecl
        #undef PNG_IMPEXP
        #define PNG_IMPEXP
    #endif

    #define PNG_USE_LOCAL_ARRAYS /* Not used in libpng, defined for legacy apps */

/* If you define PNGAPI, e.g., with compiler option "-DPNGAPI=__stdcall",
 * you may get warnings regarding the linkage of png_zalloc and png_zfree.
 * Don't ignore those warnings; you must also reset the default calling
 * convention in your compiler to match your PNGAPI, and you must build
 * zlib and your applications the same way you build libpng.
 */

    #if defined (__MINGW32__) && !defined (PNG_MODULEDEF)
        #ifndef PNG_NO_MODULEDEF
            #define PNG_NO_MODULEDEF
        #endif
    #endif

    #if !defined (PNG_IMPEXP) && defined (PNG_BUILD_DLL) && !defined (PNG_NO_MODULEDEF)
        #define PNG_IMPEXP
    #endif

    #if defined (PNG_DLL) || defined (_DLL) || defined (__DLL__) || \
    ((defined (_Windows) || defined (_WINDOWS) || \
    defined (WIN32) || defined (_WIN32) || defined (__WIN32__)))

        #ifndef PNGAPI
            #if defined (__GNUC__) || (defined (_MSC_VER) && (_MSC_VER >= 800))
                #define PNGAPI __cdecl
            #else
                #define PNGAPI _cdecl
            #endif
        #endif

        #if !defined (PNG_IMPEXP) && (!defined (PNG_DLL) || \
    0 /* WINCOMPILER_WITH_NO_SUPPORT_FOR_DECLIMPEXP */)
            #define PNG_IMPEXP
        #endif

        #ifndef PNG_IMPEXP

            #define PNG_EXPORT_TYPE1(type, symbol)  PNG_IMPEXP type PNGAPI symbol
            #define PNG_EXPORT_TYPE2(type, symbol)  type PNG_IMPEXP PNGAPI symbol

/* Borland/Microsoft */
            #if defined (_MSC_VER) || defined (__BORLANDC__)
                #if (_MSC_VER >= 800) || (__BORLANDC__ >= 0x500)
                    #define PNG_EXPORT PNG_EXPORT_TYPE1
                #else
                    #define PNG_EXPORT PNG_EXPORT_TYPE2
                    #ifdef PNG_BUILD_DLL
                        #define PNG_IMPEXP __export
                    #else
                        #define PNG_IMPEXP /*__import */ /* doesn't exist AFAIK in VC++ */
                    #endif          /* Exists in Borland C++ for
                                                C++ classes (== huge) */
                #endif
            #endif

            #ifndef PNG_IMPEXP
                #ifdef PNG_BUILD_DLL
                    #define PNG_IMPEXP __declspec(dllexport)
                #else
                    #define PNG_IMPEXP __declspec(dllimport)
                #endif
            #endif
        #endif /* PNG_IMPEXP */
    #else /* !(DLL || non-cygwin WINDOWS) */
        #if (defined (__IBMC__) || defined (__IBMCPP__)) && defined (__OS2__)
            #ifndef PNGAPI
                #define PNGAPI _System
            #endif
        #else
            #if 0 /* ... other platforms, with other meanings */
            #endif
        #endif
    #endif

    #ifndef PNGAPI
        #define PNGAPI
    #endif
    #ifndef PNG_IMPEXP
        #define PNG_IMPEXP
    #endif

    #ifdef PNG_BUILDSYMS
        #ifndef PNG_EXPORT
            #define PNG_EXPORT(type, symbol) PNG_FUNCTION_EXPORT symbol END
        #endif
    #endif

    #ifndef PNG_EXPORT
        #define PNG_EXPORT(type, symbol) PNG_IMPEXP type PNGAPI symbol
    #endif

/* Support for compiler specific function attributes.  These are used
 * so that where compiler support is available incorrect use of API
 * functions in png.h will generate compiler warnings.
 *
 * Added at libpng-1.2.41.
 */

    #ifndef PNG_NO_PEDANTIC_WARNINGS
        #ifndef PNG_PEDANTIC_WARNINGS_SUPPORTED
            #define PNG_PEDANTIC_WARNINGS_SUPPORTED
        #endif
    #endif

    #ifdef PNG_PEDANTIC_WARNINGS_SUPPORTED
/* Support for compiler specific function attributes.  These are used
 * so that where compiler support is available incorrect use of API
 * functions in png.h will generate compiler warnings.  Added at libpng
 * version 1.2.41.
 */
        #ifdef __GNUC__
            #ifndef PNG_USE_RESULT
                #define PNG_USE_RESULT __attribute__((__warn_unused_result__))
            #endif
            #ifndef PNG_NORETURN
                #define PNG_NORETURN __attribute__((__noreturn__))
            #endif
            #ifndef PNG_ALLOCATED
                #define PNG_ALLOCATED __attribute__((__malloc__))
            #endif

/* This specifically protects structure members that should only be
 * accessed from within the library, therefore should be empty during
 * a library build.
 */
            #ifndef PNG_DEPRECATED
                #define PNG_DEPRECATED __attribute__((__deprecated__))
            #endif
            #ifndef PNG_DEPSTRUCT
                #define PNG_DEPSTRUCT __attribute__((__deprecated__))
            #endif
            #ifndef PNG_PRIVATE
                #if 0 /* Doesn't work so we use deprecated instead*/
                    #define PNG_PRIVATE \
    __attribute__((warning("This function is not exported by libpng.")))
                #else
                    #define PNG_PRIVATE \
    __attribute__((__deprecated__))
                #endif
            #endif /* PNG_PRIVATE */
        #endif /* __GNUC__ */
    #endif /* PNG_PEDANTIC_WARNINGS */

    #ifndef PNG_DEPRECATED
        #define PNG_DEPRECATED /* Use of this function is deprecated */
    #endif
    #ifndef PNG_USE_RESULT
        #define PNG_USE_RESULT /* The result of this function must be checked */
    #endif
    #ifndef PNG_NORETURN
        #define PNG_NORETURN /* This function does not return */
    #endif
    #ifndef PNG_ALLOCATED
        #define PNG_ALLOCATED /* The result of the function is new memory */
    #endif
    #ifndef PNG_DEPSTRUCT
        #define PNG_DEPSTRUCT /* Access to this struct member is deprecated */
    #endif
    #ifndef PNG_PRIVATE
        #define PNG_PRIVATE /* This is a private libpng function */
    #endif

/* Users may want to use these so they are not private.  Any library
 * functions that are passed far data must be model-independent.
 */

/* memory model/platform independent fns */
    #ifndef PNG_ABORT
        #ifdef _WINDOWS_
            #define PNG_ABORT() ExitProcess(0)
        #else
            #define PNG_ABORT() abort()
        #endif
    #endif

    #ifdef USE_FAR_KEYWORD
/* Use this to make far-to-near assignments */
        #define CHECK 1
        #define NOCHECK 0
        #define CVT_PTR(ptr) (png_far_to_near(png_ptr, ptr, CHECK))
        #define CVT_PTR_NOCHECK(ptr) (png_far_to_near(png_ptr, ptr, NOCHECK))
        #define png_strcpy _fstrcpy
        #define png_strncpy _fstrncpy /* Added to v 1.2.6 */
        #define png_strlen _fstrlen
        #define png_memcmp _fmemcmp /* SJT: added */
        #define png_memcpy _fmemcpy
        #define png_memset _fmemset
        #define png_sprintf sprintf
    #else
        #ifdef _WINDOWS_ /* Favor Windows over C runtime fns */
            #define CVT_PTR(ptr)         (ptr)
            #define CVT_PTR_NOCHECK(ptr) (ptr)
            #define png_strcpy lstrcpyA
            #define png_strncpy lstrcpynA
            #define png_strlen lstrlenA
            #define png_memcmp memcmp
            #define png_memcpy CopyMemory
            #define png_memset memset
            #define png_sprintf wsprintfA
        #else
            #define CVT_PTR(ptr)         (ptr)
            #define CVT_PTR_NOCHECK(ptr) (ptr)
            #define png_strcpy strcpy
            #define png_strncpy strncpy /* Added to v 1.2.6 */
            #define png_strlen strlen
            #define png_memcmp memcmp /* SJT: added */
            #define png_memcpy memcpy
            #define png_memset memset
            #define png_sprintf sprintf
            #ifndef PNG_NO_SNPRINTF
                #ifdef _MSC_VER
                    #define png_snprintf _snprintf /* Added to v 1.2.19 */
                    #define png_snprintf2 _snprintf
                    #define png_snprintf6 _snprintf
                #else
                    #define png_snprintf snprintf /* Added to v 1.2.19 */
                    #define png_snprintf2 snprintf
                    #define png_snprintf6 snprintf
                #endif
            #else
/* You don't have or don't want to use snprintf().  Caution: Using
 * sprintf instead of snprintf exposes your application to accidental
 * or malevolent buffer overflows.  If you don't have snprintf()
 * as a general rule you should provide one (you can get one from
 * Portable OpenSSH).
 */
                #define png_snprintf(s1, n, fmt, x1) sprintf(s1, fmt, x1)
                #define png_snprintf2(s1, n, fmt, x1, x2) sprintf(s1, fmt, x1, x2)
                #define png_snprintf6(s1, n, fmt, x1, x2, x3, x4, x5, x6) \
    sprintf(s1, fmt, x1, x2, x3, x4, x5, x6)
            #endif
        #endif
    #endif

/* png_alloc_size_t is guaranteed to be no smaller than png_size_t,
 * and no smaller than png_uint_32.  Casts from png_size_t or png_uint_32
 * to png_alloc_size_t are not necessary; in fact, it is recommended
 * not to use them at all so that the compiler can complain when something
 * turns out to be problematic.
 * Casts in the other direction (from png_alloc_size_t to png_size_t or
 * png_uint_32) should be explicitly applied; however, we do not expect
 * to encounter practical situations that require such conversions.
 */
    #if defined (__TURBOC__) && !defined (__FLAT__)
        #define  png_mem_alloc farmalloc
        #define  png_mem_free farfree
typedef unsigned long png_alloc_size_t;
    #else
        #if defined (_MSC_VER) && defined (MAXSEG_64K)
            #define  png_mem_alloc(s) halloc(s, 1)
            #define  png_mem_free hfree
typedef unsigned long png_alloc_size_t;
        #else
            #if defined (_WINDOWS_) && (!defined (INT_MAX) || INT_MAX <= 0x7ffffffeL)
                #define  png_mem_alloc(s) HeapAlloc(GetProcessHeap(), 0, s)
                #define  png_mem_free(p)  HeapFree(GetProcessHeap(), 0, p)
typedef DWORD png_alloc_size_t;
            #else
                #define  png_mem_alloc malloc
                #define  png_mem_free free
typedef png_size_t png_alloc_size_t;
            #endif
        #endif
    #endif
/* End of memory model/platform independent support */

/* Just a little check that someone hasn't tried to define something
 * contradictory.
 */
    #if (PNG_ZBUF_SIZE > 65536L) && defined (PNG_MAX_MALLOC_64K)
        #undef PNG_ZBUF_SIZE
        #define PNG_ZBUF_SIZE 65536L
    #endif


/* Added at libpng-1.2.8 */
#endif /* PNG_VERSION_INFO_ONLY */

#endif /* PNGCONF_H */